/**
*      author: Y_Yao
*      created: 2025-01-25 20:07:23
**/

#include<bits/stdc++.h>

#define int LL
using namespace std;
using LL = long long;
const LL LLINF = 1e18;
const int INF = 0x3f3f3f3f;
const int N = 100 + 7;
long double a[N];
int n;

void solve()
{
    cin >> n;

    for(int i = 1;i <= n;i++)
    {
        cin >> a[i];
    }
    long double q = a[2] / a[1];
    for(int i = 2;i <= n;i++)
    {
        if(a[i] / a[i-1] != q)
        {
            cout << "No" << endl;
            return;
        }
    }
    cout << "Yes" << endl;
}

signed main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);

    int t = 1;
    while(t--)
    {
        solve();
    }
    return 0;
}